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How to get a plumber license in New Hampshire

Hours, exam, fees, renewal and continuing education for New Hampshire plumbing licenses, pulled from official NH sources and checked .

Quick answer
  • Licensing body: New Hampshire Mechanical Licensing Board (Office of Professional Licensure and Certification)
  • State journeyman license: Yes (Mec 305.01: OPLC Mechanical Licensing Board issues journeyman and master plumber licenses statewide under RSA 153:27–38.)
  • Journeyman Plumber: Apprenticeship completion certificate (or sponsor affidavit) plus ≥600 hours educational training covering Mec 305.01 topics and ≥8,000 working hours of on-the-job plumbing experience — or hold an out-of-state journeyman plumber license and pass the NH journeyman exam (≥70%). Age 18+.
  • Exam: see below, via ProV (Mechanical Licensing Board)
  • Code edition: ProV administers Master and Journeyman plumber exams for the Mechanical Board. Journeyman exam pass ≥70%; master ≥75% (Mec 305.01). Exam fee $80 per attempt (Board candidate bulletin).

Requirements by license

Journeyman Plumber

ExperienceApprenticeship completion certificate (or sponsor affidavit) plus ≥600 hours educational training covering Mec 305.01 topics and ≥8,000 working hours of on-the-job plumbing experience — or hold an out-of-state journeyman plumber license and pass the NH journeyman exam (≥70%). Age 18+.Source: gc.nh.gov · as of
ExamProV (Mechanical Licensing Board). Journeyman multiple-choice exam; pass by answering at least 70% correctly. Out-of-state path: prior license + NH exam. Cost $80 initial or retake (candidate bulletin).Source: gc.nh.gov · as of · Bulletin: oplc.nh.gov
Fees
  • Journeyman application: $198
  • Journeyman renewal: $198
  • Journeyman reinstatement: $198
  • ProV exam (per attempt): $80
Source: oplc.nh.gov · as of · Exam fee: oplc.nh.gov
RenewalEvery 2 years. Expires last day of the month the license was issued (Mec 402.01). Submit Universal Renewal + CE proof for the plumbing endorsement.Source: gc.nh.gov · as of · Fee table: oplc.nh.gov
CE to renew6 hours per 2-year licensing cycle (per plumbing endorsement)
  • Board-approved continuing education seminars (typically 3-hour classroom sessions on NH codes/laws)
Mec 404.01: ≥6 hours per endorsement every 2 years from a board-approved seminar provider. Do not repeat the same seminar for credit within a cycle.
Source: gc.nh.gov · as of

License types in New Hampshire

  • Apprentice plumber
  • Journeyman plumber
  • Master plumber
  • Mechanical business entity
Source: oplc.nh.gov · as of

Reciprocity (licensed in another state?)

Out-of-state journeyman plumber licensees may qualify by prior licensure plus passing the NH journeyman exam (≥70%) under Mec 305.01(b)(4).Source: gc.nh.gov · as of

FAQ

Does New Hampshire license journeyman plumbers statewide?

Yes. The Mechanical Licensing Board (OPLC) issues apprentice, journeyman and master plumber licenses.

What experience is required for journeyman?

Apprenticeship completion, 600 hours education, and 8,000 OJT hours — or an out-of-state journeyman license plus the NH exam (≥70%).

Already licensed? See New Hampshire plumber license renewal & CE requirements.

Other states

Compare every state side by side: license requirements by state · renewal & CE by state.